Carla was not sure about that. She felt her father would be a more expert questioner. But Walter went along with the pastor’s suggestion.

It was spring, and the weather was warmer than on Carla’s last visit. There were boats on the lake. Carla decided to ask Werner to come out here for a picnic. She wanted to make the most of him before he drifted off to another girl.

Professor Willrich had a fire blazing, but a window was open, letting in a fresh breeze off the water.

The Director shook hands with Pastor Ochs and Walter. He gave Carla a brief glance of recognition then ignored her. He invited them to sit down, but Carla saw there was angry hostility behind his superficial courtesy. Clearly he did not relish being questioned. He picked up one of his pipes and played with it nervously. He was less arrogant today, confronted by two mature men rather than a couple of young women.

Ochs opened the discussion. ‘Herr von Ulrich and others in my congregation are concerned, Professor Willrich, about the mysterious deaths of several handicapped children known to them.’

‘No children have died mysteriously here,’ Willrich shot back. ‘In fact, no child has died here in the last two years.’

Ochs turned to Walter. ‘I find that very reassuring, Walter, don’t you?’

‘Yes,’ said Walter.

Carla did not, but she kept her mouth shut for the moment.

Ochs went on unctuously: ‘I feel sure that you give your charges the best possible care.’

‘Yes.’ Willrich looked a little less anxious.

‘But you do send children from here to other hospitals?’

‘Of course, if another institution can offer a child some treatment not available here.’

‘And when a child is transferred, I suppose you are not necessarily kept informed about his treatment or his condition thereafter.’

‘Exactly!’

‘Unless they come back.’

Willrich said nothing.

‘Have any come back?’

‘No.’

Ochs shrugged. ‘Then you cannot be expected to know what happened to them.’

‘Precisely.’

Ochs sat back and spread his hands in a gesture of openness. ‘So you have nothing to hide!’

‘Nothing at all.’

‘Some of those transferred children have died.’

Willrich said nothing.

Ochs gently persisted. ‘That’s true, isn’t it?’

‘I cannot answer you with any certain knowledge, Herr Pastor.’

‘Ah!’ said Ochs. ‘Because even if one of those children died, you would not be notified.’

‘As we said before.’

‘Forgive me the repetition, but I simply want to establish beyond doubt that you cannot be asked to shed light on those deaths.’

‘Not at all.’

Once again Ochs turned to Walter. ‘I think we’re clearing matters up splendidly.’

Walter nodded.

Carla wanted to say Nothing has been cleared up!

But Ochs was speaking again. ‘Approximately how many children have you transferred in, say, the last twelve months.’

‘Ten,’ said Willrich. ‘Exactly.’ He smiled complacently. ‘We scientific men prefer not to deal in approximations.’

‘Ten patients, out of . . . ?’

‘Today we have one hundred and seven children here.’